Clinical trials should be carried out sooner for H7N9 vaccine products, but it's not necessary to conduct large-scale public immunization, experts said.

Researchers at the Shanghai Public Health Clinical Center have recently developed a genetic vaccine against H7N9 and are applying for it to undergo clinical trials.

On Jan 7, Hualan Biological Engineering Inc, in Henan province, announced on its website it had finished the preclinical study of its H7N9 vaccine products and that it is waiting for the China Food and Drug Administration to approve of its application for clinical trials of the vaccine.